Guiding commercial pilot farms to bridge the gap between experimental and commercial dairy farms; the project ‘Cows & Opportunities’
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چکیده
منابع مشابه
Economic opportunities for sexed semen on commercial dairy farms
Dairy farmers and others have been discussing the use of enriched X-bearing semen (sexed semen) for many years (Seidel and Garner, 2002). Sexing bovine semen is possible because X-sperm have 3.8% more DNA than Y-sperm. This difference can be identified with a flow cytometer by staining the sperm with a fluorescent dye that binds to the DNA. The technique is reasonably accurate (10% error rate) ...
متن کاملOptimizing the Transition Cow Management System on Commercial Dairy Farms
Nutrition and management of the transition cow continues to attract substantial research attention. Despite the tremendous quantity of research conducted on nutrition and physiology of transition cows, the transition period remains a problematic area on many commercial dairy farms, and metabolic disorders continue to occur at economically important rates (Burhans et al., 2003). Data recently su...
متن کاملThe Effect of Socio-Personal Factors on Economic and Managerial Variables in Shahroud Commercial Dairy Farms
The purpose of this research was to study the effects of four personal and social variables including the age, literacy, job experience and size of herd on different variables such as implementing of managerial strategies in transition period, relevant costs of these strategies, average production per head and gross income of milk sale per head. For this purpose all required information were co...
متن کاملFactors influencing heifer survival and fertility on commercial dairy farms.
The average dairy cow survives only three lactations, reducing the availability of replacement heifers. Prenatal losses occur due to early embryonic mortality (about 40%), later embryo loss (up to 20% in high-yielding herds) or abortion (about 5%). A recent survey of 19 UK herds showed that 7.9% of calves were born dead and 3.4% died within 1 month. During the rearing phase, 6.7% of animals wer...
متن کاملRelationship between dairy cow genetic merit and profit on commercial spring calving dairy farms.
Because not all animal factors influencing profitability can be included in total merit breeding indices for profitability, the association between animal total merit index and true profitability, taking cognisance of all factors associated with costs and revenues, is generally not known. One method to estimate such associations is at the herd level, associating herd average genetic merit with ...
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ژورنال
عنوان ژورنال: NJAS: Wageningen Journal of Life Sciences
سال: 2001
ISSN: 1573-5214,2212-1307
DOI: 10.1016/s1573-5214(01)80011-7